To me it is a matter of semantics: while the watch OS beta is not public, any member of the public can join the dev program and install. From what I can tell, watches that get bricked or fail with beta versions are covered by Apple.Where is it located, I can't seem to find it, I can only find developer downloads. Do you have a link?
How to join, download, install, and other details here:
https://developer.apple.com/support/beta-software/install-beta/